HVAC Coils Industrial Coils Heat Exchangers Tube Bundles Self Contained AC T-Bar Units Replacement and New Coils TUBE BUNDLES & HEAT EXCHANGERS Replacement Tube Bundles Tank Heaters Entire Shell & Tube Assemblies Custom Heat Exchangers We re here to assist you when choosing the right new or replacement heat exchangers & bundles for your application. 800-339-7991 www.multithermcoils.com
TUBE BUNDLES, TANK HEATERS AND SHELL & TUBE HEAT EXCHANGERS Descriptions & Features Tube Bundles MultiTherm can duplicate any existing Bundle to include dimensions, materials and performance. We can build U tube bundles, straight tube floating tubesheet bundles, or we can retube fixed tubesheet heat exchangers when the bundle is not removable. MultiTherm is not locked into any one material. Most bundles tend to be built with copper tubes and steel tubesheets. MultiTherm can offer a wide variety of materials, including: carbon steel, stainless steel, cupro-nickel, admiralty brass and many others. We also offer our special expedited shipment schedules for emergency replacement. MultiTherm can ship any copper or cupro-nickel bundle in one week or less. Tank Heaters MultiTherm builds tank heaters for either steam or hot water use. We offer either the bundle by itself, or we offer the entire tank heater assembly which includes: the bundle, cast or fabrication head, and sleeve which the bundle slides into. We have very few limitations on length or diameter and can size your tank heaters to match your existing tank. MultiTherm also offers the same wide variety of materials for tubes and tubesheets that we offer for our tube bundles. We also build tank heaters in one week or less on an expedited order. Shell & Tube Heat Exchangers MultiTherm has a great deal of experience in the design and manufacturing process of shell and tube heat exchangers. We build U tube heat exchangers, straight tube fixed tubesheet exchangers and straight tube floating tubesheet exchangers. We build our units for high thermal efficiency and we give you rugged construction for tough day to day operations. We offer you total flexibility to meet your most demanding requirements special connection sizes and locations, various tube connection sizes and locations, various tube diameters and spacing, tube lengths, and special materials. MultiTherm exchangers can be built to ASME Section VIII, Division 1 stamp, or U and UM Stamp. TABLE OF CONTENTS Tube Bundles, Tank Heaters, and Shell & Tube Heat Exchangers...2 Sample Bundle & Heat Exchanger...3 U Tube Bundle How to Measure...4 U Tube Bundle Dimensions...5 2
SAMPLE BUNDLE AND HEAT EXCHANGER TUBESHEET CARBON STEEL, NAVAL BRASS, STAINLESS STEEL OR CARBON STEEL MUNTZ METAL BAFFLES CARBON STEEL, BRASS OR STAINLESS STEEL SHELLSIDE CONNECTIONS INLET AND OUTLET THREADED OR FLANGED TUBES COPPER, CUPRO-NICKEL, CARBON STEEL, STAINLESS STEEL, ADMIRALTY BRASS REAR HEAD IF APPLICABLE TUBESIDE CONNECTION INLET & OUTLET THREADED OR FLANGED HEAD CAST OR FABRICATED GASKETS BOTH SIDES SHELL CARBON, STAINLESS STEEL, OR BRASS TUBE BUNDLE U TUBES OR STRAIGHT TUBES One of the problems that a lot of people seem to have when dealing with heat exchangers or tube bundles is the terminology used by our industry when describing the various parts of the exchanger. Using the picture above, we will identify and correctly name each component part. STANDARD COIL DIMENSIONS NUMBER OF TUBES COIL TUBESHEET STD. O.D. 3/4" 3/4" 1/2" 1/2" SIZE THICKNESS TUBESHEET 2 PASS 4 PASS 2 PASS 4 PASS 4" 3/4" 6.1875 5 4 12 10 5" 3/4" 7.1875 7 6 18 16 6" 3/4" 8.375 13 12 28 26 8" 1" 10.375 24 22 53 50 10" 1" 12.375 38 36 80 76 12" 1 14.375 57 56 127 122 14" 1 1/4" 16.25 71 72 159 154 16" 1 1/4" 18.5 96 94 208 202 18" 1 1/2" 21 127 118 20" 1 1/2" 23 165 160 326 318 Tube Counts are based on 15/16" triangular pitch for 3/4" O.D. tubes and 1 5/8" triangular pitch for 1 1/2" O.D. tubes. Four, Six and Eight Pass tube bundles have slightly lower tube counts. (Consult Factory) For nominal tube bundles larger than 20". (Consult Factory) 3
U TUBE BUNDLE How to Measure Below is a step-by-step description of all the component parts of a tube bundle that are required for duplication. Please note the corresponding component number on the table on page 5. 1. D Bundle Diameter - This is the overall diameter required to fit the bundle in an existing shell or tank. This dimension includes any baffles or tube supports. A good way to get an accurate D diameter is to measure the circumference and divide by 3.14. This gives you the diameter of the bundle. 2. OAL Overall Length - Measured from the face of the tubesheet over the entire length to include the last blend. 3. T Tubesheet Thickness - Tubesheet thickness varies from 5/8" to 3" thick. 4. TSD Tubesheet Diameter - The tubesheet diameter is always larger than the D dimension or bundle diameter. 5. Bolt Holes - Some tubesheets have bolt holes and some do not. Often the bolts that go through the head and shell bypass 6. the tubesheet that is the bolts go around the tubesheet and not through it. In this case there is no bolt hole pattern and 7. 5-6-7 are not applicable. The tubesheet is boltless. In other cases, the tubesheet is the same size as the head or shell flange and the bolts go through the tubesheet. You must know the number of bolt holes and the size of each bolt hole. Also measure the center to center distance between bolt holes. Always pick holes directly opposite from each other, such as 12 o clock and 6 o clock. 8. Number Baffles - Please see note on page 6. 9. Baffle Spacing - Distance between baffles or tube supports if there are tube supports in lieu of baffles. 10. Tube Diameter - Typical tube diameters are 3/8", 1/2", 5/8", 3/4", 1 1/4" O.D. Most steam converters and water/water exchangers are 3/4" O.D. Please note that 3/4" O.D. tubes have approximately 5/8" I.D.s. Some tank heater bundles have 1 1/4" O.D. tubes. 11. Tube Materials - Most HVAC exchangers have copper tubes and these are easy to identify. There are alternate tube materials available if you need them. Some examples are: 90/10 or 70/30 cupro-nickel, carbon steel, carpenter 20 or exotic materials like titanium. 12. Tube Thickness - Most 3/4" O.D. copper tubes are 18 GA and most 1 1/4" O.D. copper tubes are 16 GA. MultiTherm recommends and uses 16 GA for both O.D.s Heavier walls are available if required. 13. Straight Tubes - Some bundles have tubesheets at both ends and there are straight tubes between. Count the number of straight tubes. 14. U Tubes - Most replacement bundles are U tube type. Count the number of complete U s. 15. Shell or Sleeve Diameter - Specify the O.D. or the I.D. of the unit that the bundle will slide into. What we are really interested in identifying is the space available to slide the bundle into. 16. Tube Passes - Look at the tubesheet to identify the number of passes the liquid or steam makes through the tubes. Most bundles are 2 pass, but can be 4 or 6 also. 17. Tubesheet Material - Most tubesheets are carbon steel, because this is the most economical material available. Alternate materials are: stainless steel, titanium, copper faced steel, or brass. 4
U TUBE BUNDLE Dimensions DIMENSIONS MultiTherm Bolt Circle # of Bolt # of Baffle Item # Model Number D OAL T TSD DIA. BCD Bolt Holes Hole Size Baffles Spacing These numbers refer to descriptions on page 7. 1 2 3 4 5 6 7 8 9 Note: Bundles that are installed in steam converters require only tube supports or (1) or (2) baffles. Steam fills up the shell because it s a gas and requires no baffling to redirect the steam back and forth over the bundle. These steam/water exchangers do require tube supports (which resemble baffles) to hold the bundle together. Longer bundles require more supports than shorter bundles. CONSTRUCTION Tube Tube Tube # Straight # U Shell or Sleeve Passes Tubesheet Diameter Material Thickness Tubes Tubes Diameter I.D. Tubes Material 10 11 12 13 14 15 16 17 5
SPECIFICATION TO CHANGE WITHOUT NOTICE MultiTherm reserves the right to change dimensional construction, performance or any other criteria shown in this catalog without notice to its customers. CONDITION OF SALE Acceptance of Orders. Purchase orders are subject to acceptance and approval by MultiTherm (seller). No Terms or Conditions appearing on purchase orders or other related documents that are contrary to our Standard Terms and Conditions shall be binding unless specifically agreed to before and by the Seller in writing. Cancellation of Orders. The Purchaser can cancel or modify an order upon written notice and Purchaser shall pay all costs (cancellation or modification) and changes as determined in an equitable way by seller. Quotations. Any quotation in writing by MultiTherm may or may not include freight charges within the quoted price(s). Regardless, all equipment is sent F.O.B. Factory and it is the Purchaser s responsibility to make any claim for loss or damage with transportation (delivering) carrier. WARRANTY MultiTherm warrants to the original user its manufactured equipment against any defects in material or workmanship for a period of only one year from date of shipment. The equipment must be properly applied, installed and maintained under design conditions. The Seller s (MultiTherm) obligation is limited to repair or replacement, at its option, on any part or parts which upon seller s examination at its factory, shall appear to have become defective. No expense, liability or responsibility will be accepted by MultiTherm for repair made outside its factory without written approval from Seller. 800-339-7991 www.multithermcoils.com 109-42 509